# first instance
sub magic1 {
   ...
}
my $obj1 = Find::Files( 'function' => \&magic1 );

# let's do some magic!
$obj1->find_and_call_function('/tmp');

# ------------------------------------------------

# second instance
# can be in the same file or in another module
sub magic2 {
   ...
}
my $obj2 = Find::Files( 'function' => \&magic2 );

# let's do some other magic!
$obj2->find_and_call_function('/tmp');